(Eugene, OR) -- Dozens of feral cats in Eugene are being spayed and neutered today. KATU-2 reports Greenhill Humane Society and Eugene Animal Services will be performing at least 30 spay and neuter surgeries today on cats living in a colony in Eugene. Crews will humanely trap the cats, bring them in for surgery, and then release them back into the colony. The event is aimed at helping to reduce the area's feral cat overpopulation problem.